New York

JD.COM Inc has been slowly nibbling away at Alibaba Group Holding Inc's dominant share of China's burgeoning online shopping market. And the costs are adding up.

Analysts in the past four weeks have lowered their average profit forecast for JD.com this year to 34 US cents per share from 78 cents, data compiled by Bloomberg show. The 56 per cent reduction was the biggest in that period among US-traded Chinese companies with a market capitalisation of more than US$3 billion.